0c93466054
Hide parent function name in name of closurized function to user (issue 5436).
...
Hide implicit parameter of closure to user.
R=iposva@google.com
Review URL: https://codereview.chromium.org//17904009
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24504 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-27 00:49:49 +00:00
7d945c593a
Remove skip_static_calls_ as it uses an obsolete way to check for uncalled static calls. Will be replaced by ICData tracking.
...
Add two different PCDescriptors to differentiate between optimized and unoptimized static calls (the former loads args. descr, the later loads ICData before calling).
Populate static call's ic_data field when optimizing.
R=asiva@google.com
Review URL: https://codereview.chromium.org//17723002
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24433 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-25 21:31:37 +00:00
8e27430ddd
- Create isolate specific resuable handles and use them in the hot lookup paths.
...
- Create a ResuableHandleScope class which ensures that we do not end up
recursively reusing handles leading to corruption.
This change shows Dart2JSCompileAll runtime change from 739931 to about
645035 on my local machine.
R=iposva@google.com
Review URL: https://codereview.chromium.org//16174008
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24373 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-24 22:41:01 +00:00
0bf7251d1a
Reland: Optimizing noSuchMethod invocation with no arguments.
...
This is the same CL as https://codereview.chromium.org/17315008/ with
one bug fixed:
If a method is invoked with a mismatching number of arguments, we don't
add a no-such-method-dispatcher function since the dispatcher currently
can only invoke noSuchMethod and would not work if the method
is invoked with correct arguments at a later point.
I extended the test to cover that case.
TEST=tests/language/no_such_method_dispatcher_test.dart
R=srdjan@google.com
Review URL: https://codereview.chromium.org//17571010
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24351 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-24 17:18:51 +00:00
fa7817bf79
Change static calls in unoptimized code to always call via a stub. Using ICData, the call count of static calls is collected as well.
...
TODO: Use call frequency to guide inlining.
R=asiva@google.com , hausner@google.com , zra@google.com
Review URL: https://codereview.chromium.org//17554003
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24307 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-21 23:35:10 +00:00
48555c83ac
Back out r24266 to investigate dartium test failure.
...
TBR=kmillikin@google.com
Review URL: https://codereview.chromium.org//17074003
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24284 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-21 11:56:32 +00:00
ab1981b421
Optimizing noSuchMethod invocation with no arguments.
...
On each call that triggers a noSuchMethod invocation we
attach a custom dispatch function that allocates the
invocation object and invokes noSuchMethod. This dispatcher
is compiled and optimized like a normal Dart function.
Similar to method-extractors, these implicit dispatchers
do not show up as normal functions.
As a first step this CL only handles invocations of getters
and methods with no like o.foo or o.foo(). This CL gives
a >25x speedup of such noSuchMethod invocations. Calls with
multiple arguments still go through the slow path.
R=srdjan@google.com
Review URL: https://codereview.chromium.org//17315008
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24266 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-21 07:31:51 +00:00
47de186e76
Store arguments descriptor in ICData. Remove loading of arguments descriptor at unoptimized call site (the ones using ICData).
...
R=asiva@google.com , zra@google.com
Review URL: https://codereview.chromium.org//17421003
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24239 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-20 16:29:39 +00:00
3e78b2ad4a
Reapply "Initial implementation of on-stack replacement (OSR)."
...
This reapplies SVN r24024 with a bugfix.
After OSR compilation, restore the pre-OSR code (which might be already
optimized) rather than the unoptimized code (which might have its entry
patched). When the optimized code entry is patched it is only safe to call
it as a static call, not as an instance call.
R=fschneider@google.com
Review URL: https://codereview.chromium.org//17233003
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24088 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-17 11:05:15 +00:00
7192d42f46
Fix a bug in instance canonicalization and add debug mode checks that we are not missing any fields.
...
R=asiva@google.com
Review URL: https://codereview.chromium.org//17104002
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24059 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-14 22:58:48 +00:00
d6f3eccdf2
Revert "Initial implementation of on-stack replacement (OSR)."
...
This reverts commit 24024.
TBR=fschneider@google.com
Review URL: https://codereview.chromium.org//16888013
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24025 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-14 10:30:53 +00:00
0b39927d30
Initial implementation of on-stack replacement (OSR).
...
Add profiling support to select OSR candidates and launch the compiler
for OSR, followed by entry to the function at the OSR entry point.
Implemented only on IA32 and X64. The initial implementation can be
improved in various ways --- specifically: tuning of profiling
parameters and incorporation of feedback about the actual values seen
at OSR entry.
R=fschneider@google.com
Review URL: https://codereview.chromium.org//16693006
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24024 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-14 10:10:55 +00:00
3208230580
Revert r23330 and r23136 because of a bug with loop invariant code motion.
...
This CL temporarily remove deoptimzation history which was put in to prevent
repeated deoptimization caused by loop invariant code motion. It caused
illegal code motion under certain conditions.
BUG=https://code.google.com/p/dart/issues/detail?id=11245
TEST=tests/language/licm3_test.dart
Review URL: https://codereview.chromium.org//16844011
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23989 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-13 15:52:33 +00:00
5543ce104c
When canonicalize instances check if all fields are canonical. If a field is a non-canonical number or strings, canonicalize it. Otherwise report an error if a field is not canonical.
...
R=hausner@google.com
Review URL: https://codereview.chromium.org//16780009
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23934 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-12 21:27:37 +00:00
0374dc9b12
Reified metadata in the VM
...
R=asiva@google.com
Review URL: https://codereview.chromium.org//16780008
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23912 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-12 15:44:57 +00:00
7f8320e042
Make ImmutableArray a sub class of AllStatic.
...
This enables Array to be a FINAL_HEAP_OBJECT and the operators
'=' and '^=' would be a simpler implementation which does not
require a call to initializeHandle().
R=iposva@google.com
Review URL: https://codereview.chromium.org//16390002
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23884 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-11 21:52:39 +00:00
69b5efffd2
Create specific null read only handles for the frequently used types
...
Array, String, Instance, Object and use them.
R=iposva@google.com
Review URL: https://codereview.chromium.org//16336021
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23785 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-08 00:47:35 +00:00
68f4a66a3d
Improvements to 53-bit overflow checking.
...
- Integer literals that require more than 53 bits will cause a compile-time error.
- Checking is added to unary negate for the case that the most negative
53-bit integer is negated.
- The tests are improved to also check optimized code.
R=srdjan@google.com
Review URL: https://codereview.chromium.org//16664003
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23774 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-07 21:28:49 +00:00
d1fbe2117d
Fix Issue 11047: use binary search instead of linear search to locate a pc-offset in the static call table.
...
R=asiva@google.com
Review URL: https://codereview.chromium.org//16295022
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23614 260f80e4-7a28-3924-810f-c04153c831b5
2013-06-04 20:16:29 +00:00
3f97d1492a
More cleanup to avoid creation of redundant handles
...
- create read only handles for null object and sentinel smi value
- add a RawCast function to allow direct casting of Raw pointers without the
need to create a Handle for it
- use Smi::Value where possible
- hoist out handle creation from some loops
R=hausner@google.com
Review URL: https://codereview.chromium.org//15689012
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23502 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-31 22:55:29 +00:00
b60d09b1fb
- Add different types for persistent and weak persistent handles
...
in the Dart C API.
- Adapt code in the runtime.
R=asiva@google.com
Review URL: https://codereview.chromium.org//15772005
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23421 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-30 15:55:59 +00:00
7735d59c7c
More cleanup based on profile information.
...
R=iposva@google.com
Review URL: https://codereview.chromium.org//16163010
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23375 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-30 01:24:09 +00:00
fdcae8a772
Add a helper function for allocation of deoptimization history.
...
This CL addresses DBC comments from my previous CL (https://codereview.chromium.org/15779006/ )
R=srdjan@google.com
Review URL: https://codereview.chromium.org//16099007
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23330 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-29 09:11:23 +00:00
26cdebaccf
More cleanups to avoid Handle creation in hot paths.
...
R=iposva@google.com
Review URL: https://codereview.chromium.org//15951003
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23189 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-24 23:42:01 +00:00
40f0800c10
Ensures that Bigints returned to Dart are all checked by Integer::AsValidInteger.
...
Rather than by ad-hoc checks at the point of return.
R=iposva@google.com
Review URL: https://codereview.chromium.org//15741019
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23151 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-24 15:45:17 +00:00
c1a33f3ea6
Add deoptimization history to optimized functions.
...
Each function that is optimized or inlined into an optimized
functions keeps an array of deoptimization ids.
This history is used to avoid repeated deoptimization caused by
speculative hoisting of check instructions.
R=kmillikin@google.com
Review URL: https://codereview.chromium.org//15779006
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23136 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-24 12:03:40 +00:00
e33c2d4254
Delay Class parsing until the class is actually used.
...
Prior to this change the initial heap sizes were as follows:
ia32:
Size of isolate snapshot = 1230921
New space (0k of 32768k) Old space (1446k of 1604k)
X64:
Size of isolate snapshot = 1223943
New space (0k of 32768k) Old space (2630k of 2692k)
After this change the initial heap sizes are as follows:
ia32:
Size of isolate snapshot = 686443
New space (0k of 32768k) Old space (677k of 836k)
X64:
Size of isolate snapshot = 684731
New space (0k of 32768k) Old space (1220k of 1412k)
R=hausner@google.com , iposva@google.com , regis@google.com
Review URL: https://codereview.chromium.org//14820028
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23115 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-24 00:13:10 +00:00
4b497b0c17
Consolidate debug stubs
...
The new debug stub BreakpointRuntime gets the original stub address
from the debugger. With this scheme, we don't need a new debug stub
for every runtime stub that the debugger patches.
R=asiva@google.com
Review URL: https://codereview.chromium.org//15743019
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23094 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-23 18:42:03 +00:00
de8b3c18b0
Remove some dead code.
...
R=hausner@google.com
Review URL: https://codereview.chromium.org//15740015
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23046 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-23 00:26:33 +00:00
e24d83c10d
- Add a GetClassId() to Object, so that we do not have to
...
create a temporary class handle only to get at an object's
class id, which is stored in the object header.
R=asiva@google.com
Review URL: https://codereview.chromium.org//15338008
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@22904 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-20 21:01:31 +00:00
dd6ca671d7
Cleanups: addressed your comments from https://codereview.chromium.org/14962008/
...
R=iposva@google.com
Review URL: https://codereview.chromium.org//14845021
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@22881 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-17 23:45:08 +00:00
7349a6d611
Make breakpoints on == fire reliably
...
Add breakpoints in the path taken if one of the operands
in a == b is null.
R=asiva@google.com
Review URL: https://codereview.chromium.org//14991010
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@22857 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-17 17:08:09 +00:00
142b49316a
Fix issue 5275: The VM must always generate the most compact form of an integer (Smi, Mint or Bigint). Hide methods that can be used to bypass that assumption and require the use of Integer::NewXXX which is guaranteed to return the most compact integer form.
...
R=asiva@google.com
Review URL: https://codereview.chromium.org//14962008
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@22816 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-16 20:49:06 +00:00
428dea19dc
Fix crash with --no-use-cha: the optimizer expects a concrete type for array creation, not dynamic as is the result because we cannot determine without CHA if a class is guaranteed to have no sublcasses and has not been implemented. Regardless of use_cha, always rely on known information for internal classes that are not subtype or implemented by other clases.
...
R=asiva@google.com , vegorov@google.com
Review URL: https://codereview.chromium.org//15141004
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@22655 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-13 23:19:20 +00:00
0acfcf21e7
A load static of an initialized static final field can be converted to its value, as long as it is in old space or Smi, and can therefore be a literal node.
...
Add special objects to mark non_constant and unknown_constant in constant propagator so that there is no confusion with sentinels used in the graph.
R=asiva@google.com
Review URL: https://codereview.chromium.org//14969019
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@22600 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-10 21:33:14 +00:00
80c7ad1070
Implement breakpoint for closure calls
...
Introduce a new PcDescriptor kind to distinguish closure calls from other runtime calls. The debugger can patch these calls to set a breakpoint. When stepping into a closure call, the debugger must fish out the closure object from the stack, find the function and set breakpoints in it.
Arm and Mips breakpoint stubs are not implemented yet. ia32 and x64 stubs tested by hand. Automated test to follow.
R=srdjan@google.com
Review URL: https://codereview.chromium.org//14858033
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@22596 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-10 21:06:04 +00:00
2565ca222f
Implement a variation of scalar replacement for non-escaping allocations.
...
AllocationSinking pass discovers non-escaping allocations that have no input uses other than uses in the stores into its own fields.
Every environment use of such allocation is replaced by a state snapshot (MaterializeObject instruction) that describes the state of each initialized field in the object. State snapshots are computed through an additional round of load-forwarding.
Once snapshots are computed allocations are removed from the graph.
MaterializeObject instructions are not compiled into native code but produce deoptimization instructions instead that describe how object should be materialized at deoptimization.
Deoptimization instructions now follow the following format:
[mat obj #1 ]...[mat obj #N][ret addr][... mat arguments ...][... real frames ...]
- the prefix describes each object to materialize on deopt via kMaterializeObject instruction;
- actual values that are needed for materialization are emited as a part of bottom-most stack frame. This is done to simplify implementation: they need to be discoverable by a GC during materialization phase. At the end of deoptimization they will be removed from the stack;
- normal stack slots can refer to materialized objects via kMaterializedObjectRef instruction.
Additionally this change contains fixes in load-forwarding that are needed to guarantee that all artificial LoadField instructions inserted during AllocationSinking are correctly replaced with actual values.
Limitations of the current implementation:
- can't eliminate allocations that flow into phis but otherwise don't actually escape;
- can't sink allocations out of loops;
- allocation with type arguments are not handled.
R=regis@google.com , srdjan@google.com , zra@google.com
Review URL: https://codereview.chromium.org//14935005
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@22485 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-07 23:40:42 +00:00
ab188d327c
Improve performance of String.fromCharCodes by implementing it in Dart. Add tow internal natives to Dart in order to be able to allocate and fill a String. Next step is to implement String.concatAll in Dart as well and to inline String._setAt operation (currently intrinsified).
...
R=asiva@google.com
Review URL: https://codereview.chromium.org//14862006
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@22399 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-03 23:48:10 +00:00
083c9e5e95
- Remember the fact that an object has been added to the
...
store buffer by a bit in the header.
- This bit can be used to filter out redundant additions
into the store buffer making the dedup sets not needed.
- Remove the need for a HashSet when remembering old to
new references.
Review URL: https://codereview.chromium.org//14307013
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@22393 260f80e4-7a28-3924-810f-c04153c831b5
2013-05-03 20:59:42 +00:00
0e030b6f5c
Further improve type optimization reusing the type argument vector of the
...
instantiator of generic objects (fixes issue 10149).
This optimization considers the generic type argument vector of the instance
being allocated as well as the generic type argument vector of the compile
time type of the instantiator.
If the instance vector is a prefix of the instantiator vector, the instantiator
vector can be shared by the new instance.
R=srdjan@google.com
Review URL: https://codereview.chromium.org//14106013
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@22155 260f80e4-7a28-3924-810f-c04153c831b5
2013-04-29 23:39:46 +00:00
04cb8721ad
First step towards loading the core library scripts directly from the sources
...
instead of concatenating all the scripts and linking them into the executable.
- Refactor the bootstrap script loading and compilation part to use a
custom bootstrap library tag handler
R=iposva@google.com
Review URL: https://codereview.chromium.org//14520010
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@22154 260f80e4-7a28-3924-810f-c04153c831b5
2013-04-29 22:00:18 +00:00
2de2e615e6
Improve type optimization reusing the type argument vector of the instantiator
...
of generic objects:
Do not require anymore that the vector be of the same length. A longer vector
with a compatible prefix is acceptable. This saves a class id check and length
check.
We still require that the uninstantiated type argument vector be the identity
vector, i.e. consisting only of type parameters with consecutive indices
starting at zero. We will relax this requirement in a later change.
Review URL: https://codereview.chromium.org//14238036
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@22062 260f80e4-7a28-3924-810f-c04153c831b5
2013-04-26 00:04:13 +00:00
fbc931e6a6
Report OOM errors instead of asserting on allocation failures when sending
...
messages to other isolates.
Review URL: https://codereview.chromium.org//14273021
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@21980 260f80e4-7a28-3924-810f-c04153c831b5
2013-04-24 20:52:22 +00:00
c34810fd26
Preserve aggregate count when creating unary checks ICData.
...
We were reseting it to 1 which leads to worse inlining decisions for example for user defined binary operators. Inliner considered them all cold.
R=srdjan@google.com
BUG=
Review URL: https://codereview.chromium.org//14474007
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@21964 260f80e4-7a28-3924-810f-c04153c831b5
2013-04-24 17:51:10 +00:00
e2216f61bf
Fast copy between TypedData and ExternalTypedData
...
Until now, copying data from TypedData to TypedData and from ExternalTypedData
to ExternalTypedData was fast. But copying between TypedData and
ExternalTypedData was not handled in a fast way.
Review URL: https://codereview.chromium.org//14296006
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@21791 260f80e4-7a28-3924-810f-c04153c831b5
2013-04-22 08:27:15 +00:00
749ac45917
- Use DISALLOW_ALLOCATION in Object class.
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- Intercept operator delete in handles.
Review URL: https://codereview.chromium.org//13835014
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@21788 260f80e4-7a28-3924-810f-c04153c831b5
2013-04-22 05:51:47 +00:00
9b53a42536
Add flag --check-function-fingerprints, it checks all function fingerprints of the intrinsifier and method recognizer. Added flag to a test so that the fingerprints will be tested during a regular test.
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Review URL: https://codereview.chromium.org//14247005
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@21711 260f80e4-7a28-3924-810f-c04153c831b5
2013-04-18 23:18:13 +00:00
70ef44f1c2
Fix for issue 9871 - Object::empty_array() returns a broken handle.
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Review URL: https://codereview.chromium.org//14298012
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@21587 260f80e4-7a28-3924-810f-c04153c831b5
2013-04-16 22:51:24 +00:00
9ac0c8d7c9
- Allow for experimentation with different header sizes.
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Review URL: https://codereview.chromium.org//13951019
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@21505 260f80e4-7a28-3924-810f-c04153c831b5
2013-04-15 19:46:21 +00:00
54dde7ce89
Implement rethrow statement
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Or: how to turn a 5 minute task into a 2 hour ordeal.
The actual business of the change is one line in token.h and one line in parser.cc.
Review URL: https://codereview.chromium.org//14012005
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@21371 260f80e4-7a28-3924-810f-c04153c831b5
2013-04-12 16:32:37 +00:00
regis@google.com